Collapsible tower.



R. N. EMWIS.

EOLLAPSIBLE TOWER. wrvucmmm mm mm. 1915..

Patented Nov. 5, 1918.

2 SHEETS-SHEET I.

W J17 J5 J. N. EVANS.

COLLAPSIBLE TOWER. APPLICATIION nuan AUG-2. m5.

2 SHEETS-SHEET 2.

V 0 N d 6 t H E t a P avwawtom y Josnrrr 1v. EVANS, or wILson, new roan.

OFFICE.

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To aZZbv/adm itmag concern. Be it known that ll, JOSEPH N. Evans, a

citizen of the United States, residing at Wilson, in the county ofNiagara and State of New York, have invented new and useful Improvementsin Collapsible Towers, of which the following isa specification. Y

This invention is an improved collapsible tower especially adaptedforuse to support a workman in an elevated position when performing suchwork as spraying or pruning trees or the like, and for use especially inconnection with a spray rig, the object of the invention being toprovide an improved tower of this class, which is light, cheap, simple,strong and durable, which may be readily raised for use and as readilyfolded or collapsed when not in use, and which when raised is strong andrigid.

The invention consists in the construction,

combination and arrangement of devices hereinafter described andclaimed.

In the accompanying drawings Figure 1 is a side elevation of a towerconstructed in accordance with my inven tion showing the same in raisedposition.

Fig. 2 is a similar view of the tower in folded or collapsed position.

Fig. 3 is a rear elevation of the tower raised. 7

Fig. 4: is partly a plan and partly a horizontal sectional view of thesame.

Fig. 5 is a detail vertical sectional view.

In accordance with my invention T provide a bottom frame 1 which is hereshown as substantially U-shaped, comprising a pair a of parallel arms 2and a connecting portion which forms a handle 3. The arms, at their rearends, arepivotally mounted as at 4 on angle brackets 5 which are adaptedto be secured on the upper side of a suitable supporting object, suchfor instance as a spray tank. The said arms 2 of the bottom frame areeach provided at a suitable distance from the front end with a slot 6.

I also provide a pair of rear standards 7 and a pair of front standards8. Said standards diverge downwardly. The standards 7 have their lowerends pivotally connected to the bottom frame 1 by the same pivots dwhich pivotally connect the said bottom frame to the angle brackets 5and the lower.

portions of said standards 7 are connected together by crossed braces 9.Said standards are also connected together by a horizontally arrangedbrace or bar 10 at an in- Speeification of Letters Patent. Application sd August 2,1915. Seria1No.4=3,24.-O.

the bottom frame,

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are pivotally connected to the arm 2 of the bottom frame 1 by pins orbolts 12 which operate in the slots6. These standards have their lowerportions connected together by crossed braces 13 andthey are alsoconnected together, at an intermediate point by a cross brace 14, theirupper ends being; connected together by a bar 15. The upper ends of thestandards 7 and 8 are connected by bars 16 the ends of which arepivotally connected to said standards as at 17. The bars 11, 15 and 16form a top rail. The standards 7, 8 are also connectedtogether at apoint intermediate their ends by side bars 18 which are pivotallyattached thereto as at 19, 20.

A platform 21 is supported on the bars 10, 1 1 and 18. The operator whouses the tower when the latter is in set up position stands on theplatform 21 and is protected by the railing 11, 1'5, 16 as will beunderstood.

Clips 22 are also provided which are secured at suitable points on thespray tank top or other support of the tower and pins or bolts 23 areprovided which are adapted to pass through openings in said clips and tobe inserted in the slots 6 of the arms 2 of the bottom frame being thusheld on the spray tank top in horizontal position and being adapted tobe tilted or inclined if desired after the pins or bolts 23 have beenremoved. The slots 6 permit adjustment of the clips 22 on the tankas maybe required.

I also provides. pair of braces 24 each of which comprises a pair ofmembers 25, 26

connected together by a rule joint 27, the

lower end or member 25 being pivotally connected to one side of thebottom frame, at the front, as at 28 and the upper end of each member 26being pivotally connected to one of the rear standards 7 by thepivot rod29 as shown.

The rule joint braces are in extended position when the tower is set upand serve to rigidly brace the tower and hold it in upright position.When it is desired to collapse the tower, this may be done by turningthe bottom frame upwardly on the pivots 5 as shown in Fig. 2, afterhaving first removed the bolts 23 to disconnect the bottom frame fromthe clips 22. The slots 6 and like slots 18 in 18 permit sufficientslidlng movement of the pivots 12 and 20, to

allow the standards 7 and 8 to come near enough to parallel to allow atleast a reasonable collapsing ofthe tower by folding 8 down toward 7,and the braces 24 bend and permit this collapsing of the tower as shown.

Having thus described my invention I claim 'bottom frame and on whichthe same is pivotally mounted, clips, bolts detachably connecting theclips to the bottom frame and arranged in said slots and permittingadjustment of the clips, rear standards having their lower endspivotally connected to the bottom frame by the same pivots which connectthe bottom frame to said supports front standards having pivots at theirlower ends arranged for movement in said slots, a platform connectingand pivotally attached to the-front and rear standards, and foldablebraces having their front ends pivotally connected to the bottom frameand their rear ends pivotally connected to the rear standards.

In testimony whereof I aifix my signature in presence of twowitnesses.

JOSEPH N. EVANS.

Copies of thispatent may be obtained for five cents each, by addressingthe Commissioner of Patents, 3 Washington, D. C.

